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Subject[PATCH v2] mfd: cros_ec: Add commands to control codec
Date
Add EC host commands to control codec on EC.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
---
V2 fixed the wrong ancestor issue so the patch can be applied cleanly on mfd tree.
Codec driver that uses these commands will be sent separately.
Thanks!

include/linux/mfd/cros_ec_commands.h | 94 ++++++++++++++++++++++++++++
1 file changed, 94 insertions(+)

diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
index 9a9631f0559e2..fc91082d4c357 100644
--- a/include/linux/mfd/cros_ec_commands.h
+++ b/include/linux/mfd/cros_ec_commands.h
@@ -2790,6 +2790,100 @@ struct ec_response_battery_vendor_param {
uint32_t value;
} __packed;

+/*****************************************************************************/
+/* Commands for I2S recording on audio codec. */
+
+#define EC_CMD_CODEC_I2S 0x00BC
+
+enum ec_codec_i2s_subcmd {
+ EC_CODEC_SET_SAMPLE_DEPTH = 0x0,
+ EC_CODEC_SET_GAIN = 0x1,
+ EC_CODEC_GET_GAIN = 0x2,
+ EC_CODEC_I2S_ENABLE = 0x3,
+ EC_CODEC_I2S_SET_CONFIG = 0x4,
+ EC_CODEC_I2S_SET_TDM_CONFIG = 0x5,
+ EC_CODEC_I2S_SET_BCLK = 0x6,
+};
+
+enum ec_sample_depth_value {
+ EC_CODEC_SAMPLE_DEPTH_16 = 0,
+ EC_CODEC_SAMPLE_DEPTH_24 = 1,
+};
+
+enum ec_i2s_config {
+ EC_DAI_FMT_I2S = 0,
+ EC_DAI_FMT_RIGHT_J = 1,
+ EC_DAI_FMT_LEFT_J = 2,
+ EC_DAI_FMT_PCM_A = 3,
+ EC_DAI_FMT_PCM_B = 4,
+ EC_DAI_FMT_PCM_TDM = 5,
+};
+
+struct ec_param_codec_i2s {
+ /*
+ * enum ec_codec_i2s_subcmd
+ */
+ uint8_t cmd;
+ union {
+ /*
+ * EC_CODEC_SET_SAMPLE_DEPTH
+ * Value should be one of ec_sample_depth_value.
+ */
+ uint8_t depth;
+
+ /*
+ * EC_CODEC_SET_GAIN
+ * Value should be 0~43 for both channels.
+ */
+ struct ec_param_codec_i2s_set_gain {
+ uint8_t left;
+ uint8_t right;
+ } __packed gain;
+
+ /*
+ * EC_CODEC_I2S_ENABLE
+ * 1 to enable, 0 to disable.
+ */
+ uint8_t i2s_enable;
+
+ /*
+ * EC_CODEC_I2S_SET_COFNIG
+ * Value should be one of ec_i2s_config.
+ */
+ uint8_t i2s_config;
+
+ /*
+ * EC_CODEC_I2S_SET_TDM_CONFIG
+ * Value should be one of ec_i2s_config.
+ */
+ struct ec_param_codec_i2s_tdm {
+ /*
+ * 0 to 496
+ */
+ int16_t ch0_delay;
+ /*
+ * -1 to 496
+ */
+ int16_t ch1_delay;
+ uint8_t adjacent_to_ch0;
+ uint8_t adjacent_to_ch1;
+ } __packed tdm_param;
+
+ /*
+ * EC_CODEC_I2S_SET_BCLK
+ */
+ uint32_t bclk;
+ };
+} __packed;
+
+/*
+ * For subcommand EC_CODEC_GET_GAIN.
+ */
+struct ec_response_codec_gain {
+ uint8_t left;
+ uint8_t right;
+} __packed;
+
/*****************************************************************************/
/* System commands */

--
2.20.0.rc1.387.gf8505762e3-goog
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